Cloth-cutting machine



May 18 i926.

Mafih ew FB/emdorf 121ml: T'o

. 779 Jfidlw ATTTS.

May 18 1926.

M. F. BIERSDORF CLOTH CUTTING MACHINE 3 Sheets-Sheet 2 Filed July 27, 1923 IIII-I-I-I I n Y VEH To lla/fhew Z'Biemdorf @mww il 17' Yd.

May 18, 1926. 1,sss ,0r2-

M. F. BIERSDORF CLOTH CUTTING MACHINE Filed July 27, 1923 3 Sheets-Sheet 3 122' vmrog Naif/7 w Z'E/emqorf 1, 'wmziw A TT YSa stares MATTHEW 13. IBIEBISDGR-F, 'LOS ANGELES, CALIFQRNIA.

CLOTH-CUTTING MACHINE.

Application filed July 27,

ates to and has for its the pro ion of an apparatus by wnirh a pluraiity of layers of cloth can be simnltaneou l cut to pro ide neck openings, pockets, or the like. I

Although i have herein shown and will describe only one form of cloth cutting apparatus embodying my invention, it is to be understood that various changes and modifications may be made herein without d parting from the spit it of the invention and the spirit and scope of the appended claims;

In th accompanying drawings,

F 1 is a view showing in top plan, with portions thereof broken away, one form of cloth cutting apparatus embodying my invention.

Fig. 2 is a vertical sectional view tal an on the line 22 of Fig. 1. i

Fig. 3 is a vertical sectional .view taken on the line 33 of Fig. 2.

Figs. 4, and 6 are sectional views taken on the lines 4-4, 5-5 and 6-6, respectively, of Fig. 3.

7 is a detailed perspective view showing the carriage block comprised in the apparatus.

Fig. 8 is a view showing in side elevation a knife guard in applied position to the knife of the apparatus shown in the preceding views. v

9 is a transverse sectional view taken on the line 9 9 of Fig. 8.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically to the drawings, and particularlyto Figs. 1 and 2, my invention, in its present embodiment, comprises a table including a frame supported on legs 14 and on which is removably supported a platform including plates 16, 17 and 18 associated with each other through the medium of U-shaped brackets 19, to provide a continuous curved slot 20 and a linear slot 21, all as clearly shown in Fig. 1.

Upon the table, layers of cloth, designated at 22, are adapted to be supported in spanning relation to the slots 20 and 21, and securely held in this position by means of a clamping frame 23, mounted for pivotal movement upon a'yoke24, so ast'o occupy a clamping positioinshown inFigi 2, when it is engaged by latch hooks pivee 2dandexterding through suitable in the 1923. Serial No. 654,167.

The yoke 24 includes a cells; 27 which is secured to a tubular standard 23, upon which is supported for vertical sliding movement a sleeve 29 provided with an ere tension 30, to which an arm 31 is bolted or otherwise secured.

Means are provided for elevating or lowering the sleeve 29 upon the standard 28 to etiect a vertical adjustment of the arm 31,

and this means, in the present instance, coinprises shafts 32 and 33 operatively connected to sprockets 34 and 35 about which is trained an endless chain 36. Through the medium of an angle plate 37, the chain is operatively connected to the sleeve 29, such plate extending through a vertical slot 38 formed in the standard 28, so that when one stretch of the chain is moved vertically, a corresponding movementwill be imparted toithe sleeve 29. For latching the sleeve in any vertical position, a latching dog 39 is pivoted at the point indicated at 40, and is normally urged by a spring 41 to a position in which it engages teeth formed in the slot 38.

To effect actuation of the chain 36, the shaft 33 is operatively connected to a shaft 43 by means of bevelled pinions 44 (Fig. 1), the shaft 43 being arranged beneath the table top and having one end thereof extended from the table and provided with an operating crank 45.

The arm 31, as clearly shown in Fig. 3, is made up of a pair of channel irons sustained in spaced relation to provide a longitudinally extending slot 46, in which works an eye block 47 As shown in Fig. 4, a kingbolt 48 extends through the eye-block 47 and through the slot 49 of a bracket 50, a washer 51 being mounted upon the lower end of the bolt to confine the latter against displacement from the slot so that the bolt serves as a pivotal mounting for the bracket. The under side of the block 47 is provided with a master guide groove 52 in which works a pin 53 guided by the bracket 50. This pin and groove connection provides positive means for causing the bracket to describe a predetermined path when the latter is moved, it being understood that the slot 49 is such that the bracket is free to respond to the guidance of the pin 53.

. As shown in Fig. 3 th vided with tie; end'iig r coimnodate bolts 535i 2% b'racketoO is prois 54 slotted to ac ai-i ustabigy securing a motor 56 to the bracket. A cylindrical head :3? is provided with an arm 58 which bolted or ()tlltl'iis? secured to the motor 7 6. A rerti 'al arm 50 is also 'fOilllCtl interral with the head and provided with an extension G which carries a bolt (ll that 0?- tends through a slot (32 formed in the forward end of the bracket 50. As illustrated to ad- 'antage in Fig. the head is provided with a reduced lower end to form an annular shoulder (33 and an annular groove (it, the latter receiving a lociing" rii of) en eaged by a threaded extension 56 carrying handles (57. The extension (SS passes through a head 68 which interiorly threaded to engage a collar 69 which abuts the shoulder 3 and reposes upon the ring 65, all as clean 1 shown. The head 68 has secured .erc-to a depending; guiding: element '70 in ich is secured a shank T1 of a blade 72. Tl blade '72 is exposed at the lower end of the element and constitutes one of the blades oi" the cloth cutting knife. The other hi1 do is des ignated at T3 and is shown as slidalily mounted within the guiding element 70. The cutting edges of the blades T2 and T3 are in,- clined so that the two blades co-operate to provide a pointed l-inife to facilitate penetration oi the layers of cloth and to etieet a clean cutting of the cloth, as rill be understood. The blade T3 is provided with a shank it which extends upwa 'dly through a suitable opening in the head 68 and between the sertions of a block (Fig. 5) where it is secured by means of a screw bolt 76. The block is arranged within a cylindrical shell 77, and the block and blade shank 7 are formed with shoulders which cooperate with a shoulder 78 formed interiorly ot' the shell to define the lowermost position of the blade shank. The uppermost position of the blade shank is defined by a plug- T9 threadcdly fitted within the shell 7? and engaging a washer S0 intcri iosed between the block and the upper end of the shank blade. Reciprocating movement is adapted to be imparted to the shell 77 by a motor 56, the shaft S1 of the motor being provided with a crank 82 pirotally connected to a link (3 which latter in turn is pii'otallg, connected to ears 8t "formed on the block 79. The shell 77 moves in a bushing 85 and is locked against circinnt'erentia1 movement by means of ribs 86 (Fig, 5) which repose within correspondingl shaped grooves "formed in the head 57. is the shell 7? is operatirely coir nected to the blade shank 7- it will be clear that when the notor 5G is enenc'ized the reciprocating inoreinent of the shell will be llllptllitd to the blade 73 while the lade T2 remains stationary. The block 75 can he rotated within the shell 'TT so as to allow a rotational movement of the blade shank 7+. and as the head 68 can be. rotated on the. heat 57, the blades and 73 of the knife can he cireuniterentiall ins-ted leeve through which extends a screw thrcai. 1a It which capable of he r inanuall'v ri-t ated r: e 'i'..

cred; ioiuntialiuai lei means or a crank 89 wl.

adjustment ot the block -l-i' upon the arzu 511 can he eii'cctcd to vary the horizontal position oi the knife and its driving m ans.

The operation oi the apparatus as follows: As shown in Fifi. l. the scrcral layer: of cloth to he cut can be securely clamped in spanning relation to the slots '3! and it o means of a clamping' t'rzune E2 3. Normally. the knife is elevated to allow the zipplira tion of the layers of cloth. but the knil'c can be lowered so as to penetrate the sew-rat layers of cloth and thus dispose the hlad T2 within the slot it) while lililllllltllttililfj the c 'ank 4? to lower the arm ill. The horixontal positioning oi the kni'l'e \ith rrsi-cci i the groove 20 can be effected by a longitudinal adjustment ot the hlock -17 on the arm 31 through actuation of the crank F 9. in order to facilitate pa ge o l' the ltnit'e through the sereral layers oi cloth, the motor 56 is energized to cause reciprocation oi' the blade T3. The blade 72 may he consideri l i: guiding blade and the blade 7 the cutting; blade. The blade T2 eaten into the s-loi and remains at the same depth in the loth throughout the cutting action. The lllllflh i3 reciprocatcs and cuts with a stabbing action as distinguished from a shearing or ripping type. of cut.

Now that the knife occupies the position shown in Fig. 1, a cuttingoi the several lap ers of cloth to form a neck or similar opening can he eil'ected by manually gripping; the handles GT and thus naming the knife and its mounting horizontally iliroiui h the slot 20. it beingunderstood that the motor 56 and its supporting means will swingabout the kin rholt 48 as a center to allow this movement of the knife. he kniic i.-- aused to accurately follow the p; th lcfined by the groov 20 owing to the influence oi the pin 53 moving within he groovi- 52, as it will he understood that the a. 52 defines in miniature the same path groore 20, Dtlllllfl' nranual movement ol' the knife, the blade Til contin cs to he ie iprocated by the motor me so ml the layer. of cloth are cleanly cut a the knife :ulrances. ll rirtue oi the nzouutin r ol' th blades and T3. they an be tu ned in oi? direction or the other so are to at all iinri present the cutting cc ot the blade T tore most in etleet-ing the proper cutting: of the layers of cloth.

If it is desired to slit: the l:1 }'(xiS oi cloth. as when forming pockets this can be e leetet.

lll)

Within the straight slot 17 when, by operation of the crank 39, the block l? can be moved horizcaytally upon the arm 31, thereby causing the l moved along the slot 17 but under the g the operator, as will be an this operati n, the blade c J reciprocatcd so the knife advanced the several layers of cloth are out To efi ect a locking of the ln'acket with respect to the block ii, I provide a screw which threadedly f t ed in "a bra bet 5? so to en e \vithi recess ill in the block 4-4 thereby preventing movement of the bracket about the kingbolt 48, and thus providing a r'jd connection between the block and bracket.

In Figs. 8 and 9, l have shown a iard 92 for the knife of the am'r-aratus .vmch is pivotally mounted at the point indicatod at 93 to occupy the Q'uari'liug position shown in 3 or the non-guard1ng posolid lines in Fi sition shown. dotted lines. it will, of course, be understood that when the knife is operating the guard. Will occupy the dotted line position, but when inactiye, tne guard is swi to the guarding position so that the cutting edges of the blades are properly protected.

l i hat I claim is:

l. A cloth cutting apparatus comprising a knife including a stationary guiding blade and reciprocating cutting blade, having a stabbing action, and a mounting for said knife by Which it can be moved in any predetermined path.

2. A cloth cutting apparatus comprislng a table upon which layers of cloth are adapted to be supported, a knife sustained above the ta. lo and including a stationary blade and a reciprocating blade, means for driving the reciprocating. blade, a support for said driving means and said knife, and means formed on the table support by which the knife is caused, when moved, to describe a predetermined path through the layers of cloth on said table.

3. A cloth cutting apparatus comprising a table, means for clamping layers of cloth to said table, a manually movable knife above the table including a stationary blade and a reciprocating blade, means for driving the reciprocating blade, a vertically adjustable arm for supporting said driving means and knife, and means on the arm and table for causing said knife, when moved, to describe a predetermined path through the layers of cloth on said table.

In a cloth cutting apparatus, a knife mounted for vertical and ateral movement and including a stationary guiding blade, and a reciprocating cutting blade having a stabbing action and both blades operating from the same side of the cloth.

5. A cloth cutting knife co-nqiirising a stationary guide blade and a reciprocating cutting blade sliding along the guiding blade, both blades operating from the same side of the cloth, the cutting edge of the reciprocating blade moving be ond the end edge of the stationary blade.

6. A cloth cutting blade comprising a stationary guiding blade, means to adjust said blade vertically and insert its point i'iluiough the cloth to be out, and a reciprocating cutting blade sliding along the guidingblade beyond the point thereof and through the cloth from the same side of the cloth as the guiding blade.

7. A cloth cutting apparatus comprising a table having slots therein, standard, an arm adjustable vertically on the standard, a knife sustained for movement on the arm and including a stationary blade and a movable blade, said knife being adapted for move- IHQHt within the slots of said table, driving means for the reciprocating blade carried by said arm, and means interposed between the arm and driving means for causing said knife to describe the path dehned by said slots.

8. A cloth cutting apparatus comprising a table having slots therein, a standard, an arm adjustable vertically on the standard, a knife sustained for movement on the arm and including a stationary blade and a movable blade, said knife being adapted for movement Within the slots of said table, driving means for the reciprocating blade carried by said arm, and means interposed between the arm and driving means for causing said knife to describe the path defined by said slots, said means comprising a block secured to said arm and having a slot therein, and a pin associated with the driving means and movable in said slot.

9. In a cloth cutting apparatus, a table having slots therein, and means for clamping layers of cloth on the table and in span ning relation to said slots said clamping means comprising a yoke, a frame pivoted to said yoke, and means to hold the frame in l clamped position.

10.111 a cloth cutting machine, a base, standard mounted thereon, an adjustable arm on the standard, a block slidably mount-- ed on the arm, a motor supported by the block, means for rotating the motor on the arm, and a reciprocating knife operated by the motor and cutting With a stabbing actlon.

11. In a cloth cutting machine, a base, a standard mounted thereon, an adjustable arm on the standard, a block slidably mounted on the arm, a motor supported by the block, means for rotating the motor on the arm, and a knife carried by the motor including a stationar guiding blade and a movable cutting blade, tl e latter bla'de cutting with a stabbing action.

i In cloth cutting apparatus, a motor, a kni ie including a stationary guiding blade and a reeiproeating cutting; blade oil eratirely connected to said motor, said rccipr eating blade cutting with a stabl'iing action, and mean by which both oi paid lilzrdes an be moved aboia their longitudinal axes duringreeiprocatien oi the moval'ile blade.

13. in a c oth cutting apparatus, an arm, a block l l long-itndinally onthe arm. harmed with grooves, a brat mounted on the arm, a pin earr I by the bra-cl-Tet and movable in said groove 1 motor carried by the bracket, and i wile knife niorable with the lracket and inch (ling a stationary blade and a reciprocating blade operatively connected to said motor.

1 In a cloth cutting apparatus, on 111111, a. block adju ble longitudinally on the arm.

said block being formed with grooves. a bracket retire-ably mounted on the arm, a.

pin carried by the bracket and movable in said grooves a motor on 'ried bythe bracket, a rotatable knife. mo *able with the bracket and including a stationary blade and a reciprocating blade operatively connected to said motor, and means for locking said bracket against rotational movement on said block.

15. In a cloth cutting apparatus. an arm, a -arria; e adjustable longitudinally on the arm and including a bracket rotatable on the arm, a motor carried b said bracke and a rotatable kni'i e inoiablo with the. bracket and including a F ationar blade and a reciprocating blade one 'atirely connected to said motor. and means for loll-ting Said bracketag'ainst rotatioml iuoienient on said block.

16. A cloth cutting; apparatus rromprisinn a table haiingg' slots therein and upon which layers of cloth are adapted to be supported. knit'e movable in said slot 9 and iizeluding a stationary blade and a reeiproeatingblade.

means for (hiring the reeipt'oi-atin blade,

driving meas so that the knife ie ea azble o't' ttollowi 1; the path defined by said :-lot

17. In a cloth cutting apparatus. a talle upon which layers of cloth are ada 'ited to be Supported. knife guiding means formed on the table, an arm mounted for vertical adjustment above said table. a. lini'le adjustable horizontally on said arm and rotatable with respect thereto. said kn' '0 including a stationary blade morabl; enga 'ewlile r-xitli said guiding means and a reciprocating blade, and means for driving the reciprocatn9; blade.

In testimony whereof I have signed in name to this specification.

MATTHElV F. BI'ERSDORF. 

